Experiment	Measurement	Reference
LHCb	\([5.2 \pm 0.5\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{-2}\)	PRD 86, 112005 (2012)
Average	\(\mathbf{[5.2 \pm 0.6\mbox{ (combined)}] \times 10^{-2}}\)